Aluminium oxide is impermeable and, unlike the oxide layers on many other metals, it adheres strongly to the parent metal. If damaged mechanically, aluminiumâs oxide layer repairs itself immediately.
Saliva helps remove oral waste and cavity-causing bacteria, protects teeth from decay by neutralizing harmful acids, and helps re-mineralize tooth enamel. Saliva also keeps oral tissues healthy by preventing infection by controlling bacteria and fungi in the mouth.
Foods That Promote Healthy Saliva Production. Sour citrus stimulates saliva release. Nobody likes to produce so much saliva that theyâre drooling, but a lack of saliva production is problematic, too. Saliva lubricates your esophagus so food can easily slide towards your stomach.